Installation/Decommission
7. Nuts should be re-tightened when instrument reaches operating temperature.
8. Follow the same above procedure to connect calibration, exhaust line and background air line.
Sample Port
The sample port must be connected to an ambient source of sample air. When using a sample manifold
the Serinus requires at least 1.5 slpm delivered to the sample manifold (1 slpm for measurement plus
approximately 50% excess).
Calibration Port
The calibration port can be connected to the span/zero sources. It is recommended that a gas dilution
calibrator (Ecotech’s Serinus Cal 1000, 2000 or 3000) be used with a cylinder of carbon monoxide (CO)
to deliver precise concentrations of CO.
Note: All connections to this port should not exceed ambient pressure. A vent is required for
excess span gas.
Exhaust Port
The exhaust port is where the measured sample, calibration gases and background air are exhausted
from the instrument. The exhaust port should be connected to the vacuum pump using 1/4” OD tubing.
The P030004 240 V vacuum pump (P030005, 110 V) available from Ecotech, can be used to provide
the required vacuum and flow for one Serinus 30 analyser as well as two other instrument such as a
Serinus 10 or Serinus 50.
CAUTION
Carbon monoxide (CO) is a toxic gas. It is recommended that exhaust air is
expelled into an unoccupied area, as it contains trace levels of carbon monoxide.
Furthermore, the exhaust must be a suitable distance from the sample inlet to
avoid influencing the ambient measurements.
Background Air Port
The background air port is used to supply air to the CO-CO
2
converter (CO scrubber) within the
instrument. This is used for backgrounds and internal zero calibration.
2.3.3 Communications Connections
There are a number of ways to communicate with the instrument, refer to Section 4 for detail.
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